What is the statute of limitations on possession of firearms in CA?

Answer:
The usual statute of limitations period for felonies in California is three years, and most firearms crimes are felonies. It is probable that this period applies to the offense you are concerned with, though there might be some firearms offense with a longer period that I am not considering.

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This isn't the place for a question like this considering the "characters" that spend their days here.

My advice to you would be to call a defense attorney and, for a free over-the-phone consultation, get some idea of how the law applies in your situation.

Good luck!